Force-feed lubricator.



J. C. ROSS.

FORCE FEED LUBRICATOR.

APPLICATION HLED MAR.2I. 19:7.

Patented June 25, 1918.

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W w m a'nuawtoz J 61 Ross.

J. C. ROSS.

FORCE FEED LUBRICATOR. APPLICATION FILED MAR. 27, 1917. 1,270,440,Patented June 25, 1918.

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ammoz J 6130s:

J. C. ROSS.

FORCE FEED LUBRIG'ATOR.

APPLICATION FILED MAR. 27, 1917.

Patented June 25, 1918.

8 $HEETS-SHEET 3.

J. C. R055.

J. C. ROSS.

FORCE FEED LUBRICATOR. APPLICATION FILED MAR. 27. m2.

Patented June 2", 1918.

8 SHEET$SHEET 4.

J. C. ROSS.

FORCE FEED Luamcmoa.

APPLICATION min MAR. 21. 1917. L 1,270,440. Patented June 25, 1918.

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J. C. ROSS.

FORCE FEED LUBRICATOR.

APPLICATION FILED MAR. 27, WW.

1,270,440. Patented June 25, 1918.

8 SHEETS-SHEET I,

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J. C. ROSS.

FORCE FEED LUBRICATOR.

APPLICATION HLED mini. um.

Patented June 25, 191-8.

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JOHN e. ROSS, or AKRON, onro.

FORCE-FEED LUBRICATOR.

Specification of Letters Patent.

Patented June 25, 1918.

Application filed March 27, 1917. Serial No. 157,727.

To all whom it may concern:

Be it known that 1, JOHN C. Ross, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented certain new and useful Improvement-s in Force-Feed Luhricators,of which the following is a specification This invention relates to animproved force feed lub'ricator and has as its primary object to providea device of this character which will be mechanically operated forpumping different kinds or grades of luhricants from diii'crem; supplytanks therefor and forcing tl'ie lubricants to theirrespective points ofdischarge.

The invention has as a further object to pro vide a novel arrangementwherein the luhricants upon being pumped from the supply tanks thereforwill be heated so that the said lubricants will be maintained fluent andwherein the lubricants will be discharged through pipes carried along asteam line to maintain the lubricants heated until finally discharged.

A further object of the invention is to provide a device of thischaracter having a nmnber of feeds for supplying each of the separatelubricants to'be delivered by the device so that the lubricator willthus be adapted to oil a corresponding number of parts and wherein thepumps employed in connection with all of the said feeds as well as thepumps for drawing the lubricants from the supply tanks. will all bemounted upon common reciprocating members to be simultaneously opera-tedthereby.

A further object of the invention is to provide a lubricator wherein theflow of the lubricant may be manually "adjusted and wherein any excesslubricant drawn up by the pumps will be automatically returned to therespective supply tanks therefor.

' And the invention has as a still further object to provide alubricator of the above described character having an improved meclranism for reciprocating the pump pistons of the device.

'Qth'er and incidental objects will appear as the description proceedsand in the drawings wherein I have illustrated the preferred embodimentof the invention and wherein similar reference characters "designatecorresponding parts throughout the severel views:

Figure l is a fragmentary plan view of my improvedluhricat'orparticularly showing the mounting of the pump pistons of thedevice,

Fig. 2 isa longitudinal sectional View particularly showing the .pawland ratchet gear employed for rotating the cam shaft o'fthe lubric'ator,

Fig. 3 is a longitudinal sectional view taken on the line 3-3 of Fig. 1and showin the arraiwement of the cam yokes employed and the mounting ofthe cam to cooperate with the said yo'hes for actuating the pump pistonsof the lubricator,

Fig. 4 is a transverse sectional view taken on the line 4% of Fig. 1 andparticularly showing the construction of the cams and iilustrating themanner in which the discharge pipc's from the lubricator are carriedalong a steam line for maintaining thelubricant within the said pipesheated,

Fig. 5 is a fragmentary sectional view showing one of the manifolds ofthe device,

Fig. '6 is a detail sectional view taken on the line G of Fig. l andillustrating the check valve employed in each of the supply pipesleading to the pumps respectively,

"Fig. 7 is a fragmentary plan view showing a modification of theinvention wherein the pump pistons of the device are mounted directlywithin the lubricant tank,

Fig. 8 is a longitudinal sectional view of the modified constructionparticularly showing the pump employed and the overflow from the feedmanifold,

Fig. 9 is a transierse sectional view taken on the line 9'9 of Fig. .8particularly showing the construction of the cross head employed tocarry the pump pistons,

Fig. 10 is a fragmentary sectional view illustrating the arrangementofthe discharge pipes in connection with the modified form of theinvention,

Fig. 10 is a fragmentary plan view of the pipes shown in Fig. 10.

Fig. 11 is a fragmentary plan view of a lOO still further modificationof the invention, and

Fig. 12 is a fragmentary longitudinal sectional view of the form of theinvention illustrated in Fig. 11.

In carrying out the invention, my improved lubricator is formed with asuitable base 10 upon which is mounted oppositely disposed complementalpump mechanisms indicated as a whole by the numerals 11 and 12respectively. These mechanisms are identical in construction and onethere-of only .will accordingly be described, the mechanism 11 beingchosen.

. and arranged to extend substantially parallel thereto are a pluralityof feed chambers 17 preferably six in number. Mounted to reciprocatewithin the chambers 17 are a plurality of feed pump pistons similar tothe pistons 16 and three of which have been indicated at 18 while theother three have been indicated at 19. The pistons 15, 16, 18 and 19 areall mounted to slide through suitable packing glands 20 threaded intothe body block 13 and at their outer extremities, are connected by atransversely extending cross head or bar 21, with the pistons looselyfitted through the said bar and screw threaded toreceive nuts adjustablyconnecting the pistons with the bar.

Formed through the ends of the body block 13 to communicate with thepump chambers 14 and 14 are suitable passages in which are threadedsupply pipes 22 and 23 respectively each having a check valve 24interposed therein, as shown in detail in Fig. 6, and also a cut-offvalve 25. Connected with the supply pipes 22 and 23 are, as particularlyshown in Figs. 4 and 5, upstanding overflow pipes 26 and 27respectively. Intel-posed in the lower extremities of these overflowpipes are spring pressed check valves 28, arranged with the valvesmovable downwardly against the tension of thespringsthereof to openposition. Mounted upon the upper ends of the overflow pipes, are elbows29 and extending between by a nut or collar 32 closing the saidmanifolds at the adjacent ends thereof. Mounted upon the elbows 29 tocommunicate with the overflow pipes 26 and 27, are pressure domes 33 and34 respectively.

Extending laterally and forwardly from I the manifold 30 are, asparticularly shown ,thelouter ends of the lsaidfifeed pipes, are

elbows 37 having feed nozzles 38 extend ing downwardly therefrom. Screwthreaded upon the lower extremities of the said nozzles are flangedcollars 39 receiving the upper extremities of sight tubes 40, the lowerends of which are fitted within suitable packing glands 41 screwthreaded into the top of the body block 13 withthe said sight tubescommunicating with passages leading'into the feed chambers in the saidblock. The upper ends of the feed nozzles 38 are formed to provide valveseats and screw threaded upon: the elbows 37 are a plurality of manuallyadjustable valves arranged to co6perate with said seats, the

valves associated with the pipes 35 being indicated at 42 while thevalves associated with the pipes 36 are indicated at 43. 7

Screw threaded into the outer ends of the feed chambers 17 in the block13 are a pluand 48 respectively associated with the pumps 1.5 and 16.The feed pipes 47 and 48 are connected to the manifolds 30 and 31,adjacent the outer ends thereof, and mount ed within the said pipes arecheck valves 49 adapted to prevent a back-flow within the pipes. Thedischarge pipes 44 and 45are carried away from the body block 13 in anypreferred direction and, at their outer extremities, are arranged toparallel a steam line or pipe 50 leading from asuitablesource of steamsupply. Connecting the outer extremities of .the discharge pipes withthe steam pipe 50, is a band 51. Any suitable number of these bands maybe employed for holding the discharge pipes against the steam pipe 50 tobe heated therefrom with the discharge pipes contacting with the pipe 50throughout the greatest possible portion of their length up to thepoints of final dis charge of the said discharge pipes.

Leading from the steam pipe 50 is a reduced branch steam pipe 52 which,as particularly shown in Figs. 4- and 5, is carried through themanifolds 30 and 31 and is provided, at its discharge end, with ashut-off valve 53. Interposed in the said steam pipe between the mainsteam line and the manifold 30, is a second shut-off valve 54.

It is now to be observed that the cross bars 21 of the mechanisms 11 and12 are arranged in substantially parallel relation with the supply pipes22 from the said mechanisms extending toward each other. Connected withthe supply pipes 22 at one side of the base 10, is a suitable lubricanttank or container 55 and connected with the supply pipes at the oppositeside of the base is a similar tank or container 56.

Mounted between the cross heads is a cam gear for reciprocating the saidcross heads and consequently reciprocating the several pistons connectedthereto. This cam gear includes a driven shaft- 57 mounted to extendtransversely of the base 10 substantially midway between the blocks 13and rotatably supported by suitable brackets 58 and 59 up standing fromthe base. wise secured upon the shaft 57 are cams 60. These cams eachinclude, as particularly shown in Fig. 4, a cylindrical body 61 at oneend of which is formed a radial flange 62. The opposite end of the body61 is screw threaded to detachably receive a cap 63 having a radialflange 6& formed there on to confront the flange 6Q. Rotatubl mountedbetween the said flanges are a plurality oftransversely extendinganti-friction rollers 65 confronting the peripheral face of the body 61.Connected at their extremities to the cross bars 21 and arranged tocoiiperate with the cam 60 are yokes 66 disposed for engagement by therollers 65 of the said cams for shifting the yokes to reciprocate thesaid bars.

Connected to the outer terminal of the shaft 57, is a rock arm 67 andmounted upon the adjacent extremity of the said shaft inwardly of therock arm, is a. ratchet 68 fixed to rotate with the shaft. Pivoted uponthe upper end of the rock arm is a pawl 69 arranged to co6perate withthe said ratchet. Consequently, actuation of the rock arm 67 will serveto rotate the shaft 57 by a step by step movement for reciprocating thecross bars 21. Freely mounted upon the shaft 57 inwardly of the ratchet68, is a se ment 7 0 upon one extremity of which ispivoted a pawl 71arranged to cotiperate with the ratchet 68 for holding the shaft 57against retrograde movement. The opposite extremity of the segment isformed with an arcuate slot 7 2 and projecting from the bracket 59through the said slot is a suitable post receiving a nut 73 adjustableto bind Keyed or otheragainst the said segment. Therefore, as will beobserved, the segment 70 may be adjustably rotated about the shaft 57 toposition. the pawl 71 in the path of the pawl 69. The pawl 69 will thusbe caused to ride over the pawl 71 and the engagement between the pawl69 and the ratchet 68 accordingly controlled for varying the steppedtravel of the shaft 57. The arm 67 may be operatively connected with anysuitable source of power for rocking the said arm.

In use, the tank 55 is preferably filled with one grade of lubricantwhile the tank 56 is' filled with another grade of lubricant. With thevalves 25 opened, lubricant from the tank 55 will. upon thereciprocation of the cross arms 21, int-he manner previously described,be drawn out through the supply pipes 22 at one side of the base 10 bythe circulating pump pistons 15 and into the pump chambers 14 whilethelubricant within the tank 56 will be drawnout through the supply pipes23 at the opposite side of the base by the circulating pump pistons 16and into the pump chambers 14-. The piston 15 will then operate to forcethe lubricant in the chambers 14 up through the pipes =l7 and into themanifolds 30 while the pistons 16 will operate to force the lubricant inthe pump chambers 14;? up through the pipes 18 into the manifolds 31.From the manifolds 30, the lubricant delivered by the pumps 14 will thenbe forced through the pipes 35 and through the nozzles 38 associatedwith the said pipes with the valves 42 operable for controlling the flowof the lubricant through the said nozzles and into the feed chambers 17associated with the discharge pipes 44. The lubricant delivered by thepistons 16 will be forced from the manifolds 31 out through the pipes 36and through the nozzles 38 associated with the said pipes with thevalves 43 operable for controlling the flow of the lubricant through thesaid nozzles into thefeed chambers 17 associated with the pipes45. Thefeed of the lubricant from the nozzles 38 may thus be easily regulatedand in this. connection, it will be observed that the sight tubes 40provide an easy means for accurately determining the flow ofthelubricant. Lubricant deposited in the chambers 17 associated with thedischarge pipes 44 will, as will be clear, he forced out of the saidchambers and through the said pipes by the feed pump pistons 18 whilelubricant entering the chambers 17 associated with the pipes 15 will beforced out of the said chambers and through the said pipes by the feedpump pistons 19. The different lubricants within the tanks will thus besimulta neously drawn in and discharged without becoming mixed so thatthe device may thus be readily employed in any instance where it isdesired to feed different grades or kinds along the main steam linev 5O5thelubricant in 'being forced" through these "dischargeff." pipes Willbe again heated before '7 being:

of lubricants simultaneously Furthermore,

it'is tofbe observed that three discharge pipes f adslfor. ea hi b c nla iprov ed"i115.

conl lection with eachpumpg mechanising When the device is thus L beingoperatedp thevalves 53 and 5d, withinjftlie. branch;

steam pipes 52, are opened so that steam. will" flow fthrough thesepipes from the main steam pipe 50 and "be carried through the: manifolds30 and3l. The" portions of the) pipes 52 within the said manifoldswillthus be kept hot and willheat' the lubricant" as it islde'liveredintothe manifoldsfso that the lubricant will be rendered perfectlyjfiuent to v f,

tacle 74 is employed. Mounted to depend into one end of the receptacleis a'body blook 75, fandf fclosingifthe said? receptacleus a lidreciprocate? a piston TSislidable through a be discharged through'thenozzles 381 Since; the dischargejpipes 44 and 45 are carried;

finally dischargedy Ltherefore, provide'an arrangement wherein thelubricant "willbi initially heated'torender thelubricant fluent and willthen be. reheated before being delivcred for use.

'. cip'rocate" pistons: ,85 slidable' through pack discharged into themanifoldsj3O and31:by'

the circulating pump pistons l5 'and 16"thanr:-, can flow" past thevalves and throughthenozzles 38. Consequently, the" overflow pipes 26and 27 are provid'edii Excess 1ubri=-.

cant ill the manifolds '30gwill be forced jbyi' the pistons 15 downthrough 'tl'ieoveiflow pipes 26 and through the waives 28"a ss'o' ciatedwith the said pipes to be returned"! into the supply, pipes22' h. a k1whence the lubricant wasfirst'drawn. I111;

like manner, excesslubricant iir the mani-f, folds 31, will be forced by"the pistons; 16f

doivn through. the overflow pipes 27fand; through the checkvalves.28,.associated'withij the saidpipes.) to be" returnedf'iritothe' supplypipes 23 'connectediwithfthe tanki 56 whence the lubricant was first"drawn.

Overflow lubricant in thevmanifolds some? tension of theuvsprings ofthecheck'valves;

128 so that theseivalv'esrwill readily respond packing gland; 7 9screwth'readed intoi'th'e" block. Goiinectedwith "the; batten of" thebl'oclfand" dependingpinto the receptacle 'is' valveis :a screen 832Formed, 111' the block 5, at opposite sides of'the pump chamber 77 andarranged sub-' stantiallyf parallel" thereto are"- feed pump chambers 84in which are mounted to. re-

ingglan'ds 86 similar to the glands'79." Con;

nected tothe-outer extremities of the pistons H r i78 and'85 is atransversely arranged 'cross' Attention is now directed'to' the factthatf. owing to the presence of the valves42' and' 43, a greater. volumeof lubricant maybe.

bar orfhead- Sf'l'fhaving' the said 'pisto'ns fitted'through suitable:notches therein, as particularly "shown inFig; 9, and adjust ablyjconnected iwith the barby a plurality b-ar87is a yoke 88 having .asupporting jrod "89 extending laterally therefrom at; the side -of "thel yoke opposite" to the saidbar. The rod 88'is mounted to slide'withinfa suitable boss or sockt QO pro;

jecting inwardly, frolnthe adjacent end Wall of the receptacle 74' andclosed at its" outer Depending from .the yoke is slidably receivedbetweenv guides 93 upstanding from'the bottom wall of the receptacle,The rod .89 ancbextension 92 aretl'i'us adapted to rigidly support theyoke for re-" ciprocatory movement; 7

Screw threaded into the upper-extremity of the passagefil of the block'75'is a feed ranged va transversely extendinglmanifold' 95'. 'Leadlngfrom th1s,,-man1f0ld is an overpipe- 9 41 fat the upper end "ofwhichisarleading/through the block. Mounted Within i to the pressure ofexcess i lubricant in.;the

manifolds 30' and 31" and-fpermit "such ex cess lubricant to readilyflow past thevajlves back into the respective supplypipesthere for.Furthermore, it is to be observed that;

the pressure in the domes 3.3 and 34ewi'llact to maintain a constant.:flow of lubricant to feed nozzles 38 even thoughthe lubricant pumpsact intermittently In Figs; 7, 8, 9,'and 10 ofjthe drawings,

I have illustrated a modificationvof, the invention wherein an oblongllubrica'ntyrecep the lower end of thesaidpassage is a spring pressed,check valve 98 shiftable downwardly; to open position against thetension of the spring thereof. Connected with the extremities 20f themanifold '95 are elbows .99 in ,which are fitted. 'depending feed 1nozzles 100i and "screw threaded upon the said nozzles ,arefiangedcollars'l0l in which are mounted sight tubes 102 fitted, {attheir lower ends; within suitable passages 103 formed in the block: 75to communicate with I the feed jchambe'rs;841i; Packing glands are l asaid union.

preferably provided to receive the lower. ends of the sight tubes. Thefeed nozzles 100 are, at their upper ends, formed to provide valve seatsand screw threaded upon the elbows 99 to cooperate with the said seatsare manually operable valves 104 adjustable to control the feed of thelubricant to the chambers 81.

Formed in the block 75 to communicate with the feed chambers 84; aredischarge passages 105 having check valves 106 arranged therein andscrew threaded into the blocks to communicate with the said; passages,are lubricantdischarge aipes 107 and 108. respectively. The pipe 10 7is. equipped with an. elbow 109 and mounted in this elbow is a checkvalve 110 adapted to revent a back flow within the pipe 107 w ile thevalve 106 will prevent back flow within the passage 105 of the block 75.Connected with the elbow 109 is a T union 111 from which extends a pipe112 fitted into a steam line or pipe 113. Threaded into the adjacentextremity of the elbow 109 and: extending: through the union 111 andpipe 112 is a pipe 111 discharging into the pipe 113.

Connected with the union 111 is a branch steam pipe 115 leading to apassage through the block 75 and communicating with a steam duct 116 etending within the receptacle 74: down 01 e corner thereof beneath the.Said block and along one side of the receptacleat the junction of thesaid seat with the bottom wall of the receptacle. The duct 116 ispreferably formed integral with the receptacle and leading from. thesaid duct is a discharge pipe 117. Interposed in the pipe 115 is ashut-01f valve 118;

The lubricant discharge pipe 108 is equipped with a check valve 108 anda T union 119 into one end of which is threaded a steam nozzle 120 whilea discharge pipe 121 extends from the opposite end of the Threaded into.the nozzle 120 is a branch pipe 122' communicating with the branch steampipe 115 below the valve 118. It isnow to be observed that thelubrition. Connected to the outer end-of the shaft 124 is a pawl andratchet mechanism and rock'arm for rotating the shaft by a step by stepmovement, the said pawl and ratchet mechanism and the said rock armbeing also neat-an with structure; ere-visual scribed in this regard.The reference. numerals upon these parts have accordingly. beenduplicated.

It. will now be seen that reciprocation of the yoke 88 by the cam 125will simultane ously reciprocate the pistons 78 andv 85. Re ciprocationof the circulating pump system 7 8 will actto draw the lubricant upthrough the supply pipe 80 into the circulating pump chamber 77. From.this chamber, the lubricant will then be. forced up through the passage81 and past a check valve 126 arranged in the said passage to enter thepipe 9-1 and flow into the manifold 95. From the manifold, the.lubricant will. be forced in opposite directions through the nozzles1-00 to be regulated in its. flow by the valves 1 04 and into. thepassages 103. to enter the piston chambers 84. The feed pump pistons 85will then act to. force the lubricant out through the discharge pipes107 and 108. Lubricant flowing through the pipe. 107 will, as will beobserved, be discharged flOIlI the. pipe 111 into the. steam pipethrough the pipe 108 will be discharged into the steam pipe 121. Thisprovides an arrangement wherein the device may be used in connectionwith an engine employing high and low pressure cylinders with the pipe113 leading to the high. pressure cylinder and the pipe 121 leading tothe low pressure cylinder and it is to be observed that the lubricantwill be discharged directly into the said pipes to be delivered. to thecylinders. By opening. the valve 118, steam will be permitted to flowfrom the pipe 113 through the pipe 115 and through the duct 116 in thereceptacle 7'1 to main tain the said duct hot. This duct will,therefore, act to keep the lubricant within the receptacle hot so thatthe said' lubricant will always be maintained fluent and since the pipes107 and: 108 are arranged to parallel the steam pipe 115, each. for aportion of its length, the lubricant being discharged through the saidlubricant pipes, wild: be again heated before being finally d eliw'eredinto the steam pipes 113 and 121 In this connection, it is to beobserved that when the valve 118 is open, steam will flow through thenozzle 120 to: cause a suction at the. adjacent end of the lubricantpipe 108. This suction will tend to draw the lubricant through the saidpipe into. the union 119 and then force the lubricant through the pipe121 with the valve 108. acting to. pr'e vent any water of condensationfrom flowing into the lubricant pipe. Excess lubri cant pumped intothe.manifold 95 the pump 7 8 may fiowbackthrough. thep1pe96 and: passage 97into the receptacle.

In Figs. 11 and 12 of the drawings, I

have illustrated stilli tut-then modification 113, while the lubricantflowing pistons 131 corresponding to these parts as associated with theblock 7 5 of the modification previously described. Connecting thepistons of each block is across head or bar 132. These bars are arrangedsubstantially parallel and are joined by a yoke 133 simisaidblocks in asimilar manner.

lar to the yoke 88 of the prior modification. J ournaled between theside walls of the receptacle is a shaft 134 similar to the shaft 124 andmounted upon the outer end of this shaft 134 is the rock arm and pawland ratchet mechanism previously described in connection with thepreferred form of the invention. Keyed upon the shaft to cooperate withthe yoke 133 for reciprocating the cross arms132, is a cam 135 identicalwith the cams 60 previously described. Mounted upon the blocks 128 and129 are the manifolds 136 and 137 respectively. These manifolds areequipped with the feed control valves 138 similar to the valves 104 ofthe prior modification with the manifolds communicating with the feedchambers of the Leading from the manifolds are overflow pipes 138, thesepipes being similar to the pipes 96 of the prior modification. Thecirculating pump of the block 128 is provided with a supply pipe 139similar to the supply pipe 80 While the circulating pump of the block129 is provided with a supply pipe 140 which may be led to a suitablelubricant receptacle or tank independent of the receptacle 127; Leadingthrough the block128 is a steam .pipe 141 which communicates with a duct'l42 'within the receptacle, this duct being similar to the duct 116previously described. Communicating with the feedpump cham bers of theblock 128 are the lubricant discharge pipes 143 and communicating withthe feed pump chambers of the block 129 are the lubricant dischargepipes 144. These. discharge pipes may be carried off to parallel a mainsteam line as illustrated in connection with the preferred form of theinvention or maybe fitted to cooperate with steam pipes similar to the.pipes 113 and 121,

as illustrated in connection with the modification of inventionpreviously described,the pipe 141, in either instance, of course, beingconnected with a steam supply pipe.

As will now. be observed, this present modification of theinventionprovides an arrangement wherein one lubricant may be foldconnected with thefeed pump chambers intermediate the ends thereof andcomm'unicating with the outer end of the circulating pump chamber,discharge pipes leading from the outer ends of the feed pump chambers,and a steam pipe extending axially throughthe manifold and terminatingbeyond the ends thereof.

2. A device of the character described including a body having acirculating pump chamber and a feed pump chamber formed therein, pistonsmounted to reciprocate in said chambers means for-reciprocating thepistons, a supply tank communicating with the circulating pump chamber,a connection between the circulating pump chamber and the feed pumpchamber, a discharge pipe leading from the feed pump chamber, anoverflow pipe leading from the said connection and communicating withthe tank, a pressure valve arranged in said overflow pipe, and apressure dome at the upper. end of said pipe.

3. A device of the class described including a body having circulatingpump chambers and feed pump chambers formed therein, pistons mounted toreciprocate in said chambers, a supply tank communicating with one ofthe circulating pump chambers, a second supply tank communicating withthe other circulating pump chamber, a manifold connecting the firstmentioned circulat- 1 mg pump chamber with some of the feed pumpchambers, a second manifold connecting the second circulating pumpchamber with the remainingfe'ed pump chambers,

. fold connecting the first mentioned'circulab means common to bothmanifolds for closing the inner ends thereof, discharge pipes-lead-' ingfrom the respective feed pump chambers, and means for reciprocating thepistons for said chambers, means for reciprocating the pistons, a supplytank communicating with the circulating pump chamber, a connectionbetween the feed pump chamber and the circulating pump chamber, a mainsteam pipe, a branch steam pipe leading from the main steam pipe andextending axially through the connection between the pump chambers andtern'iinating beyond the ends thereof, and a discharge pipe leading fromthe feed pump chamber and carried to and along the main steam pipe.

In testimony whereof I afiix my signature.

JOHN G. ROSS. [L. s.]

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

